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1 | /*\r |
2 | * winproxy.c: Windows implementation of platform_new_connection(),\r |
3 | * supporting an OpenSSH-like proxy command via the winhandl.c\r |
4 | * mechanism.\r |
5 | */\r |
6 | \r |
7 | #include <stdio.h>\r |
8 | #include <assert.h>\r |
9 | \r |
10 | #define DEFINE_PLUG_METHOD_MACROS\r |
11 | #include "tree234.h"\r |
12 | #include "putty.h"\r |
13 | #include "network.h"\r |
14 | #include "proxy.h"\r |
15 | \r |
16 | typedef struct Socket_localproxy_tag *Local_Proxy_Socket;\r |
17 | \r |
18 | struct Socket_localproxy_tag {\r |
19 | const struct socket_function_table *fn;\r |
20 | /* the above variable absolutely *must* be the first in this structure */\r |
21 | \r |
22 | HANDLE to_cmd_H, from_cmd_H;\r |
23 | struct handle *to_cmd_h, *from_cmd_h;\r |
24 | \r |
25 | char *error;\r |
26 | \r |
27 | Plug plug;\r |
28 | \r |
29 | void *privptr;\r |
30 | };\r |
31 | \r |
32 | int localproxy_gotdata(struct handle *h, void *data, int len)\r |
33 | {\r |
34 | Local_Proxy_Socket ps = (Local_Proxy_Socket) handle_get_privdata(h);\r |
35 | \r |
36 | if (len < 0) {\r |
37 | return plug_closing(ps->plug, "Read error from local proxy command",\r |
38 | 0, 0);\r |
39 | } else if (len == 0) {\r |
40 | return plug_closing(ps->plug, NULL, 0, 0);\r |
41 | } else {\r |
42 | return plug_receive(ps->plug, 1, data, len);\r |
43 | }\r |
44 | }\r |
45 | \r |
46 | void localproxy_sentdata(struct handle *h, int new_backlog)\r |
47 | {\r |
48 | Local_Proxy_Socket ps = (Local_Proxy_Socket) handle_get_privdata(h);\r |
49 | \r |
50 | plug_sent(ps->plug, new_backlog);\r |
51 | }\r |
52 | \r |
53 | static Plug sk_localproxy_plug (Socket s, Plug p)\r |
54 | {\r |
55 | Local_Proxy_Socket ps = (Local_Proxy_Socket) s;\r |
56 | Plug ret = ps->plug;\r |
57 | if (p)\r |
58 | ps->plug = p;\r |
59 | return ret;\r |
60 | }\r |
61 | \r |
62 | static void sk_localproxy_close (Socket s)\r |
63 | {\r |
64 | Local_Proxy_Socket ps = (Local_Proxy_Socket) s;\r |
65 | \r |
66 | handle_free(ps->to_cmd_h);\r |
67 | handle_free(ps->from_cmd_h);\r |
68 | CloseHandle(ps->to_cmd_H);\r |
69 | CloseHandle(ps->from_cmd_H);\r |
70 | \r |
71 | sfree(ps);\r |
72 | }\r |
73 | \r |
74 | static int sk_localproxy_write (Socket s, const char *data, int len)\r |
75 | {\r |
76 | Local_Proxy_Socket ps = (Local_Proxy_Socket) s;\r |
77 | \r |
78 | return handle_write(ps->to_cmd_h, data, len);\r |
79 | }\r |
80 | \r |
81 | static int sk_localproxy_write_oob(Socket s, const char *data, int len)\r |
82 | {\r |
83 | /*\r |
84 | * oob data is treated as inband; nasty, but nothing really\r |
85 | * better we can do\r |
86 | */\r |
87 | return sk_localproxy_write(s, data, len);\r |
88 | }\r |
89 | \r |
90 | static void sk_localproxy_flush(Socket s)\r |
91 | {\r |
92 | /* Local_Proxy_Socket ps = (Local_Proxy_Socket) s; */\r |
93 | /* do nothing */\r |
94 | }\r |
95 | \r |
96 | static void sk_localproxy_set_private_ptr(Socket s, void *ptr)\r |
97 | {\r |
98 | Local_Proxy_Socket ps = (Local_Proxy_Socket) s;\r |
99 | ps->privptr = ptr;\r |
100 | }\r |
101 | \r |
102 | static void *sk_localproxy_get_private_ptr(Socket s)\r |
103 | {\r |
104 | Local_Proxy_Socket ps = (Local_Proxy_Socket) s;\r |
105 | return ps->privptr;\r |
106 | }\r |
107 | \r |
108 | static void sk_localproxy_set_frozen(Socket s, int is_frozen)\r |
109 | {\r |
110 | Local_Proxy_Socket ps = (Local_Proxy_Socket) s;\r |
111 | \r |
112 | /*\r |
113 | * FIXME\r |
114 | */\r |
115 | }\r |
116 | \r |
117 | static const char *sk_localproxy_socket_error(Socket s)\r |
118 | {\r |
119 | Local_Proxy_Socket ps = (Local_Proxy_Socket) s;\r |
120 | return ps->error;\r |
121 | }\r |
122 | \r |
123 | Socket platform_new_connection(SockAddr addr, char *hostname,\r |
124 | int port, int privport,\r |
125 | int oobinline, int nodelay, int keepalive,\r |
126 | Plug plug, const Config *cfg)\r |
127 | {\r |
128 | char *cmd;\r |
129 | \r |
130 | static const struct socket_function_table socket_fn_table = {\r |
131 | sk_localproxy_plug,\r |
132 | sk_localproxy_close,\r |
133 | sk_localproxy_write,\r |
134 | sk_localproxy_write_oob,\r |
135 | sk_localproxy_flush,\r |
136 | sk_localproxy_set_private_ptr,\r |
137 | sk_localproxy_get_private_ptr,\r |
138 | sk_localproxy_set_frozen,\r |
139 | sk_localproxy_socket_error\r |
140 | };\r |
141 | \r |
142 | Local_Proxy_Socket ret;\r |
143 | HANDLE us_to_cmd, us_from_cmd, cmd_to_us, cmd_from_us;\r |
144 | SECURITY_ATTRIBUTES sa;\r |
145 | STARTUPINFO si;\r |
146 | PROCESS_INFORMATION pi;\r |
147 | \r |
148 | if (cfg->proxy_type != PROXY_CMD)\r |
149 | return NULL;\r |
150 | \r |
151 | cmd = format_telnet_command(addr, port, cfg);\r |
152 | \r |
153 | {\r |
154 | char *msg = dupprintf("Starting local proxy command: %s", cmd);\r |
155 | /* We're allowed to pass NULL here, because we're part of the Windows\r |
156 | * front end so we know logevent doesn't expect any data. */\r |
157 | logevent(NULL, msg);\r |
158 | sfree(msg);\r |
159 | }\r |
160 | \r |
161 | ret = snew(struct Socket_localproxy_tag);\r |
162 | ret->fn = &socket_fn_table;\r |
163 | ret->plug = plug;\r |
164 | ret->error = NULL;\r |
165 | \r |
166 | /*\r |
167 | * Create the pipes to the proxy command, and spawn the proxy\r |
168 | * command process.\r |
169 | */\r |
170 | sa.nLength = sizeof(sa);\r |
171 | sa.lpSecurityDescriptor = NULL; /* default */\r |
172 | sa.bInheritHandle = TRUE;\r |
173 | if (!CreatePipe(&us_from_cmd, &cmd_to_us, &sa, 0)) {\r |
174 | ret->error = dupprintf("Unable to create pipes for proxy command");\r |
175 | return (Socket)ret;\r |
176 | }\r |
177 | \r |
178 | if (!CreatePipe(&cmd_from_us, &us_to_cmd, &sa, 0)) {\r |
179 | CloseHandle(us_from_cmd);\r |
180 | CloseHandle(cmd_to_us);\r |
181 | ret->error = dupprintf("Unable to create pipes for proxy command");\r |
182 | return (Socket)ret;\r |
183 | }\r |
184 | \r |
616741f3 |
185 | SetHandleInformation(us_to_cmd, HANDLE_FLAG_INHERIT, 0);\r |
186 | SetHandleInformation(us_from_cmd, HANDLE_FLAG_INHERIT, 0);\r |
187 | \r |
0edafb21 |
188 | si.cb = sizeof(si);\r |
189 | si.lpReserved = NULL;\r |
190 | si.lpDesktop = NULL;\r |
191 | si.lpTitle = NULL;\r |
192 | si.dwFlags = STARTF_USESTDHANDLES;\r |
193 | si.cbReserved2 = 0;\r |
194 | si.lpReserved2 = NULL;\r |
195 | si.hStdInput = cmd_from_us;\r |
196 | si.hStdOutput = cmd_to_us;\r |
197 | si.hStdError = NULL;\r |
198 | CreateProcess(NULL, cmd, NULL, NULL, TRUE,\r |
199 | CREATE_NO_WINDOW | NORMAL_PRIORITY_CLASS,\r |
200 | NULL, NULL, &si, &pi);\r |
201 | \r |
202 | CloseHandle(cmd_from_us);\r |
203 | CloseHandle(cmd_to_us);\r |
204 | \r |
205 | ret->to_cmd_H = us_to_cmd;\r |
206 | ret->from_cmd_H = us_from_cmd;\r |
207 | \r |
208 | ret->from_cmd_h = handle_input_new(ret->from_cmd_H, localproxy_gotdata, ret);\r |
209 | ret->to_cmd_h = handle_output_new(ret->to_cmd_H,\r |
210 | localproxy_sentdata, ret);\r |
211 | \r |
212 | /* We are responsible for this and don't need it any more */\r |
213 | sk_addr_free(addr);\r |
214 | \r |
215 | return (Socket) ret;\r |
216 | }\r |